:root{--bg: #07070f;--bg-2: #0d0e1c;--panel: rgba(13, 15, 28, .82);--line: rgba(0, 229, 255, .22);--pink: #ff2d78;--cyan: #00e5ff;--gold: #ffd166;--lime: #7dff5e;--orange: #ff9f1c;--red: #ff2d55;--violet: #9b5cff;--text: #eef0ff;--dim: #9aa3c7;--font: "PingFang HK", "PingFang SC", "Noto Sans HK", "Microsoft JhengHei", system-ui, -apple-system, "Segoe UI", sans-serif}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html{color-scheme:dark}html,body{height:100%;overflow:hidden;overscroll-behavior:none}body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.5;touch-action:manipulation}#app{position:fixed;top:0;right:0;bottom:0;left:0;background:radial-gradient(1000px 600px at 85% -10%,rgba(255,45,120,.16),transparent 60%),radial-gradient(900px 700px at 0% 110%,rgba(0,229,255,.12),transparent 55%),radial-gradient(700px 500px at 50% 50%,rgba(155,92,255,.08),transparent 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18px #00e5ff40;transform:translateY(-1px)}.btn:active{transform:translateY(1px) scale(.98)}.btn:disabled{opacity:.45;cursor:default;transform:none;box-shadow:none}.btn.primary{background:linear-gradient(135deg,#ff2d78e6,#9b5cffe6);border-color:#ff2d78b3;box-shadow:0 0 22px #ff2d7859}.btn.primary:hover{box-shadow:0 0 30px #ff2d788c;border-color:var(--pink)}.btn.small{padding:7px 14px;font-size:13px;border-radius:9px}.btn.grow{flex:1}.btn.lang-btn{padding:8px 14px;font-size:14px}.icon-btn{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:#0d0f1cb3;color:var(--cyan);font-size:15px;display:inline-flex;align-items:center;justify-content:center}.icon-btn:hover{box-shadow:0 0 14px #00e5ff4d}.panel{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 8px 40px #00000073,inset 0 0 60px 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0 2px}.hero-neon{font-size:clamp(40px,11vw,76px);font-weight:900;line-height:1.1;color:#fff;text-shadow:0 0 8px #fff,0 0 22px var(--pink),0 0 60px var(--pink),0 0 90px rgba(0,229,255,.55);animation:neon-breathe 3.4s ease-in-out infinite}.hero-tag{color:var(--dim);font-size:15px;margin-top:6px}.home-scroll>.panel,.home-scroll>section{width:100%;max-width:640px}.dropzone{border:2px dashed rgba(0,229,255,.45);border-radius:14px;padding:26px 16px;text-align:center;cursor:pointer;transition:border-color .15s,box-shadow .2s,background .2s;background:#00e5ff08}.dropzone:hover,.dropzone.drag{border-color:var(--pink);background:#ff2d780f;box-shadow:0 0 26px #ff2d7840 inset}.dropzone.drag{transform:scale(1.01)}.drop-icon{font-size:34px;color:var(--cyan);text-shadow:0 0 14px var(--cyan);margin-bottom:6px}.drop-hint{color:var(--dim);font-size:14px;line-height:1.6}.upload-status{margin-top:12px;display:flex;align-items:center;gap:12px;padding:10px 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var(--line);background:#14182ccc;font-size:15px;font-weight:600}.chance-btn.active{background:linear-gradient(135deg,#ff2d7859,#ff2d7826);border-color:var(--pink);box-shadow:0 0 16px #ff2d7866}.setup-notes{color:var(--dim);font-size:13px;max-width:420px;text-align:center}.dancer-label{margin-top:4px}.dancer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:10px;width:100%;max-width:640px}.dancer-card{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 6px 7px;border-radius:14px;border:1px solid var(--line);background:#14182cbf;overflow:hidden;transition:border-color .12s,box-shadow .15s,transform .12s}.dancer-card:hover{border-color:var(--cyan);transform:translateY(-1px)}.dancer-card.active{border-color:var(--pink);box-shadow:0 0 18px #ff2d7873,inset 0 0 24px 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ease-out}#hud-pause{pointer-events:auto;flex:none}.hud-center{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:center;pointer-events:none}.banner{position:absolute;top:26%;left:50%;transform:translate(-50%);font-weight:800;letter-spacing:.22em;font-size:20px;color:var(--dim);opacity:0;transition:opacity .2s;white-space:nowrap}.banner.show{opacity:1}.banner.ready{color:var(--cyan);text-shadow:0 0 16px rgba(0,229,255,.6);animation:ready-breathe 1.2s ease-in-out infinite}.banner.finish{font-size:clamp(24px,6vw,40px);color:#fff;text-shadow:0 0 12px #fff,0 0 34px var(--gold),0 0 70px var(--pink);animation:finish-flash .5s ease-in-out infinite alternate}.grade-popup{font-size:clamp(46px,11vw,86px);font-weight:900;letter-spacing:.04em;opacity:0;transform:scale(.6)}.grade-popup.show{animation:grade-pop .75s cubic-bezier(.2,.9,.3,1.4) forwards}.grade-popup.perfect{color:var(--gold);text-shadow:0 0 18px rgba(255,209,102,.9),0 0 60px 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